Steam-blower.



No. 860,585. PATBNTED JULY-16, 1967.

G. J. TREADGOLD.

STEAM BLOWER.

APPLIUATION IILED MAR. 22, 1906.

3 WWW l George JTreaigoll.

THE NaRRls PETERS ca.. WASHINGTON, n c.

GEORGE I. TREADGOLD, OF INDIANAPOLIS, INDIANA.

STEAM-BLOWER.

Specification of Letters Patent.

Patented July 16, 1907.

Application filed March 22,1906. Serial NO- 307,453-

To all whom it may concern:

Be it known that I, GEORGE J. TREADGOLD, of Indianapolis, county ofMarion, and State of Indiana, have invented a certain new and usefulSteamB1ower; and I do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, in which like letters refer to like parts.

The object of this invention is to increase very perceptibly theefliciency of steam blowers, and that result is accomplished by theinvention herein including within a circular casing a steam pipe that isdouble looped and substantially S-shaped, so that it lies against thewall of the casing and extends also across the space within the casingand is provided throughout its length with two series of steam ports,one near each margin, as the same is viewed from within the furnace orcasing, the ports on the two sides being so bored or arranged as todiverge from each other. The result is a number of diverging andconverging jets of steam that so intermingle as to fill the passagewayor casing and cause a powerful suction effect whereby air is drawn intothe casing or passageway and mingled with the steam and expelled intothe furnace.

The nature of the invention will be understood from the accompanyingdrawings and the following description and claims.

In the drawings Figure 1 is a perspective view of the device separatedfrom the furnace. Fig. 2 is a longitudinal section of a portion of thefurnace showing the front wall and a part of one of the grate bars andthe blower in place, the blower being shown in central verticallongitudinal section. Fig. 3 is a section on the line 33 of Fig. 2. Fig.4 is a section of the steam pipe on the line 44 of Fig. 3.

In detail 10 represents the front wall of the furnace and 11 one of thegrate bars.

12 is the blower casing secured in and extending through the front wall10 below the grate and discharged immediately under the grate. The outerend of this casing or shell is flaring and the inner end is veryslightly flaring. A steam pipe 13 is located outside of the furnace andis supplied with steam by means of a pipe or other means running fromthe boiler, the said connection not being here shown. The pipe 13 entersthe blower casing 12 on the upper side thereof and is coiled aboutwithin said casing in the form of a substantially Sshaped double loop,as appears in Fig. 3, and leaves the casing on the lower side. After thepipe enters the casing it hugs rather closely the inner surface of thecasing for about one half its internal circumference and then extendsacross the space within the casing substantially diametrically to thepoint of entrance and therefrom hugs the other side of the casing forsubstantially half the internal circumfei'ence thereof and issues on thelower side at a point diametrically opposite the entrance of said pipe.

Steam ports 14 are bored in the pipe in two rows or series, one neareach margin of the pipe as the same is viewed from the interior of thelower casing and as shown in Fig. 3. These ports are bored through thepipe substantially radially so that the ports along one side of the pipediverge from those along the other side and the steam that issues fromthem likewise diverges.

With this arrangement of the steam-pipe l3 and its ports 14 there isprovided a very large portion of the steam pipe within the casing, sothat there is opportunity for providing a large number of steam portsissuing therefrom. The pipe lies near the internal surface of thecasing, except the middle portion of the pipe which extends across thespace within the casing, thus furnishing also two passageways for theentering air, each passageway between the coils of said pipe beingpear-shaped and located on each side of the middle portion of said steampipe, as appears in Fig. 3.

In operation the steam issues from all of the ports 14 in diverging andconverging lines, as is illustrated in Fig.- 2. This multiplicity ofdiverging and converging jets of steam practically fills the casing andhas a powerful suction effect by way of drawing in the air from theoutside and mixing it very minutely and thoroughly with the steam andforcing the combined air and steam into the furnace beneath the gratebars, thus securing an effective forced draft and maintaining thecinders and ashes in a moist condition so as to greatly promotecombustion.

What I claim as my invention and desire to secure by Letters Patent is:

l. A steam blower including an open ended casing, and a steam-pipeentering said casing and coiled about therein adjacent to the wall ofthe casing and substantially in the form of an S-shaped double loop andprovided with a multiplicity of steam ports, substantially as set forth.

2. A steamblower including an open ended casing, a steam-pipe enteringthe same and coiled therein in the form of a substantially S-shapeddouble loop and provided on its inner surface with a series ofdiametrically extend ing steam ports along a line near each side thereofwhereby two series of diverging ports are provided along the coil ofpipe.

In witness whereof, I have hereunto affixed my signature in the presenceof the witnesses herein named.

GEORGE .T. TREADGOLD.

Witnesses HELEN B. McCono, N. ALLEMONG.

